package com.itheima.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.itheima.mapper.EmpMapper;
import com.itheima.pojo.Emp;
import com.itheima.pojo.PageBean;
import com.itheima.service.EmpService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmpServiceImpl implements EmpService {
    @Autowired
    private EmpMapper empMapper;

//    @Override
//    public PageBean page(Integer page, Integer pageSize) {
//        //1.获取总记录数
//        Integer count=empMapper.count();
//        //2.获取当前页数据列表
//        Integer start=(page-1)*pageSize;
//        List<Emp> empList=empMapper.page(start,pageSize);
//        //3.封装pageBean返回数据
//        PageBean pageBean=new PageBean(count,empList);
//        return pageBean;
//    }

    /**
     * 使用pagehelper插件
     * @param page
     * @param pageSize
     * @return
     */
    @Override
    public PageBean page(Integer page, Integer pageSize, String name, Short gender, LocalDate begin, LocalDate end) {
        //1.设置分页参数
        PageHelper.startPage(page,pageSize);
        //2.执行查询
        List<Emp> empList = empMapper.list(name, gender, begin, end);//这里查询到的结果实际上是Page类
        Page<Emp> p=(Page<Emp>) empList;//强转成Page类型
        //3.封装pageBean返回数据
        PageBean pageBean=new PageBean(p.getTotal(),p.getResult());
        return pageBean;
    }

    @Override
    public void delete(List<Integer> ids) {
        empMapper.delete(ids);
    }

    @Override
    public void save(Emp emp) {
        emp.setCreateTime(LocalDateTime.now());
        emp.setUpdateTime(LocalDateTime.now());
        empMapper.save(emp);
    }

    @Override
    public Emp selectById(Integer id) {
        return empMapper.selectById(id);
    }

    @Override
    public void update(Emp emp) {
        emp.setUpdateTime(LocalDateTime.now());
        empMapper.update(emp);
    }

    @Override
    public Emp login(Emp emp) {
        return empMapper.getByUsernameAndPassword(emp);
    }
}
